Ingame mod selector ui.

OpenRA.Mods.RA/Widgets/Delegates/MainMenuButtonsDelegate.cs

@@ -13,6 +13,8 @@ using OpenRA.FileFormats;
 using OpenRA.Network;
 using OpenRA.Server;
 using OpenRA.Widgets;
+using System;
+using System.Drawing;
 
 namespace OpenRA.Mods.RA.Widgets.Delegates
 {
@@ -28,6 +30,45 @@ namespace OpenRA.Mods.RA.Widgets.Delegates
 			widget.GetWidget("MAINMENU_BUTTON_MUSIC").OnMouseUp = mi => { Widget.OpenWindow("MUSIC_MENU"); return true; };
 			widget.GetWidget("MAINMENU_BUTTON_REPLAY_VIEWER").OnMouseUp = mi => { Widget.OpenWindow("REPLAYBROWSER_BG"); return true; };
 			widget.GetWidget("MAINMENU_BUTTON_QUIT").OnMouseUp = mi => { Game.Exit(); return true; };
+			
+			var selector = widget.GetWidget<ButtonWidget>("QUICKMODSWITCHER");
+			selector.OnMouseDown = _ => ShowModsDropDown(selector);
+			selector.GetText = ActiveModTitle;
+		}
+		
+		string ActiveModTitle()
+		{
+			var mod = Game.modData.Manifest.Mods[0];
+			return Mod.AllMods[mod].Title;
+		}
+		
+		bool ShowModsDropDown(ButtonWidget selector)
+		{
+			var dropDownOptions = new List<Pair<string, Action>>();
+			
+			foreach (var kv in Mod.AllMods)
+			{
+				var modList = new List<string>() { kv.Key };
+				var m = kv.Key;
+				while (!string.IsNullOrEmpty(Mod.AllMods[m].Requires))
+				{
+					m = Mod.AllMods[m].Requires;
+					modList.Add(m);
+				}
+					
+				dropDownOptions.Add(new Pair<string, Action>( kv.Value.Title,
+					() => Game.InitializeWithMods( modList.ToArray() ) ));
+			}
+				                    
+			DropDownButtonWidget.ShowDropDown( selector,
+				dropDownOptions,
+				(ac, w) => new LabelWidget
+				{
+					Bounds = new Rectangle(0, 0, w, 24),
+					Text = "  {0}".F(ac.First),
+					OnMouseUp = mi => { ac.Second(); return true; },
+				});
+			return true;
 		}
 	}
 }